An inner extension pipe for verifying sterilization effect of live virus wastewater treatment equipment

Abstract

This utility model relates to an inner extension tube for verifying the sterilization effect of a live virus wastewater treatment equipment. Its structure includes an inner extension tube body, which comprises several main tube units connected end-to-end. Each main tube unit has several holes spaced apart on its side. A support circular plate is radially arranged on the inner side of each main tube unit corresponding to a hole. A biological indicator is placed on the support circular plate within the hole. One end of one main tube unit has an internally threaded hole, and the other end of the connected main tube unit has an externally threaded portion. The internally threaded hole and the externally threaded portion are threaded together. The inner extension tube body also includes a secondary tube connected to one end of a main tube unit via a chain. A drain valve connecting pipe is located at the center of the bottom of the inactivation tank body, and the secondary tube is placed inside the drain valve connecting pipe. The advantages of this utility model are: simple and reasonable structural design, wide applicability, effective handling of insufficient room height, effective prevention of biological indicator detachment, and convenient verification of the most unfavorable sterilization point.

Description

Technical Field

[0001] This utility model relates to an inner extension tube for a storage tank, specifically an inner extension tube used in a live virus wastewater treatment device in a high-level biosafety laboratory for verifying the sterilization effect using a biological indicator, belonging to the field of biosafety technology. Background Technology

[0002] Live virus wastewater treatment equipment is one of the key protective devices in high-level biosafety laboratories, mainly composed of collection tanks, inactivation tanks, and transfer pumps. According to Article 4.11 of RB / T 199-2015 "Technical Specification for Biosafety Performance Evaluation of Laboratory Equipment", the sterilization effect of the live virus wastewater treatment equipment should be verified after installation and commissioning but before it is put into use. Generally, unsterilized biological indicators are used to verify the sterilization effect.

[0003] Specifically, the unsterilized biological indicator is placed at different heights and at the most unfavorable point at the bottom of the inactivation tank. The biological indicator is then sterilized according to the adjusted inactivation program, typically at 121°C for 30 minutes. After the inactivation process, the biological indicator is removed and placed in an incubator for 48 hours. If the indicator turns yellow after incubation, sterilization is considered unqualified; otherwise, it is considered qualified.

[0004] In existing technologies, a stainless steel pipe of appropriate length is typically cut according to the height of the inactivation tank as the inner extension pipe, and the biological indicator is fixed to the pipe using a strip. In practical use, if the room height is insufficient, it is inconvenient to insert the inner extension pipe into the inactivation tank; on the other hand, since the biological indicator is fixed using a strip, it may fall off under high temperatures, affecting the verification of sterilization effect; furthermore, for the drain valve at the bottom of the inactivation tank, which is the most unfavorable point for sterilization, the drain valve needs to be removed first before the biological indicator is placed at the valve connection, which is quite inconvenient. Utility Model Content

[0005] This utility model proposes an inner extension tube for verifying the sterilization effect of a live virus wastewater treatment equipment. Its purpose is to overcome the above-mentioned deficiencies of the existing technology, meet the normal use of the inner extension tube when the room height is insufficient, and prevent the biological indicator from falling off.

[0006] The technical solution of this utility model: An inner extension tube for verifying the sterilization effect of a live virus wastewater treatment device. Its structure includes an inner extension tube body, which comprises several main tube units connected end-to-end. Each main tube unit has several holes spaced apart on its side. A support circular plate is radially arranged on the inner side of each corresponding main tube unit. A biological indicator is placed on the support circular plate within the hole. One end of one main tube unit has an internal threaded hole, and the other end of the connected main tube unit has an external threaded portion. The internal threaded hole and the external threaded portion are threaded together. Dividing the inner extension tube body into several main tube units avoids the inconvenience of placing the inner extension tube into the sterilization tank due to insufficient room height. The biological indicator, placed on the support circular plate within the hole, is fixed with a strip in the prior art and will not fall off due to high temperature.

[0007] Preferably, the inner extension tube extends into the inactivation tank body through an inlet at the top of the inactivation tank body. A snap-fit ​​connector is connected to the top of the uppermost main tube unit, and a snap-fit ​​blind plate with an opening is connected below the snap-fit ​​connector. The snap-fit ​​blind plate is fixed to the top of the inactivation tank body. The snap-fit ​​connector is used for sealing the inner extension tube.

[0008] The inner tube body also includes a secondary tube body connected to one end of the main tube body unit via a chain. The secondary tube body has a hole on its side, and a supporting circular plate is radially arranged inside the secondary tube body corresponding to the hole. A drain valve connecting pipe is located at the center of the bottom of the inactivation tank body, and a drain valve is connected to the outside of the drain valve connecting pipe. The secondary tube body is placed inside the drain valve connecting pipe. The drain valve connecting pipe is located at the most unfavorable sterilization point at the bottom of the inactivation tank body. The chain provides a flexible connection, which avoids the situation where the biological indicator cannot be inserted because the top extension inlet of the inactivation tank body and the most unfavorable sterilization point at the bottom are not on the same line.

[0009] The advantages of this utility model are: simple and reasonable structural design, wide applicability, effective handling of insufficient room height, effective prevention of biological indicator detachment, and convenient verification of the most unfavorable sterilization point. Specifically,

[0010] 1) Divide the inner tube into multiple sections. One section of the inner tube can be inserted into the tank and then connected to another section. Finally, assemble the complete inner tube for use in sterilization effect verification. This can effectively address situations where the room height is insufficient.

[0011] 2) Holes are made at intervals on the side of the inner tube, and a support plate is welded to the bottom of the hole to place the biological indicator. Compared with the existing technology of strip fixing, this can effectively avoid the situation where the strip softens due to high temperature, which leads to the biological indicator falling off.

[0012] 3) The bottom is connected by a soft chain, which facilitates the placement of the biological indicator at the most unfavorable sterilization point, namely the drain valve at the bottom of the tank. This avoids the situation in existing technologies where the biological indicator cannot be placed because the top inlet and the most unfavorable sterilization point at the bottom are not on the same line. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal extension tube used for verifying the sterilization effect of the live virus wastewater treatment equipment of this utility model.

[0014] Figure 2 This is a schematic diagram of the working state of the inner extension tube used to verify the sterilization effect of the live virus wastewater treatment equipment of this utility model.

[0015] In the diagram, 1 is the inactivation tank body, 11 is the inlet, 12 is the drain valve connecting pipe, 2 is the inner extension pipe body, 21 is the main body unit, 211 is the internal threaded hole, 212 is the external threaded part, 22 is the secondary pipe body, 23 is the chain, 24 is the snap-fit ​​connector, 25 is the snap-fit ​​blind plate, 26 is the hole, 27 is the support circular plate, and 3 is the drain valve. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to embodiments and specific implementation methods.

[0017] like Figure 1 As shown, an inner tube for verifying the sterilization effect of a live virus wastewater treatment device has the following structure: an inner tube body 2. The inner tube body 2 includes several main tube units 21 connected end to end and a secondary tube 22 connected to one end of a main tube unit 21 by a chain 23. Each main tube unit 21 has several holes 26 spaced apart on its side, and the secondary tube 22 has one hole 26 on its side. Each hole 26 corresponds to a main tube unit 21 and a secondary tube 22 with a support circular plate 27 radially arranged on the inner side. A biological indicator is placed on the support circular plate 27 in the hole 26 and interconnected. One end of one main tube unit 21 has an internal threaded hole 211, and the other end of the connected main tube unit 21 has an external threaded part 212. The internal threaded hole 211 and the external threaded part 212 are threadedly connected to each other.

[0018] Dividing the inner tube body 2 into several main tube units 21 can avoid the situation where the inner tube is inconvenient to put into the inactivation tank due to insufficient room height. The biological indicator is placed on the support circular plate 27 in the hole 26, which, compared with the existing technology of strip fixation, will not fall off due to high temperature.

[0019] like Figure 2As shown, the inner tube body 2 extends into the inactivation tank body 1 through the inlet 11 at the top of the inactivation tank body 1. The top of the main tube body unit 21 at the top is connected to the snap-fit ​​connector 24. The snap-fit ​​blind plate 25 with an opening is connected below the snap-fit ​​connector 24. The snap-fit ​​blind plate 25 is fixed to the top of the inactivation tank body 1. A drain valve connecting pipe 12 is provided at the center of the bottom of the inactivation tank body 1. A drain valve 3 is connected to the outside of the drain valve connecting pipe 12. The secondary tube body 22 is placed inside the drain valve connecting pipe 12.

[0020] The cartridge connector 24 is used to seal the inner tube body 2. The drain valve connecting pipe 12 is the most unfavorable point for sterilization at the bottom of the inactivation tank body 1. The chain 23 realizes a flexible connection, which can avoid the situation where the biological indicator cannot be put in because the top extension inlet 11 of the inactivation tank body 1 and the most unfavorable point for sterilization at the bottom are not on the same line.

[0021] The dimensions, opening size, and quantity of each structure can be manufactured according to the specific specifications of the inactivation tank body 1. The connection of each main body unit 21 can also be achieved using a chuck connection, as long as the connection method facilitates disassembly. The top snap-fit ​​blind flange 25 can be replaced according to the connection method of the reserved interface on the top of the inactivation tank body 1. For example, if the reserved interface on the top of the inactivation tank body 1 is a flange connection, the snap-fit ​​blind flange 2 can be replaced with a flange blind flange. Example

[0022] The main body units 21 are connected by G3 / 4” thread, and the external threaded part 212 is welded to the main body unit 21.

[0023] The main body unit 21 has an outer diameter of 38.1 mm, and the secondary body 22 has an outer diameter of 25.4 mm. Both the main body unit 21 and the secondary body 22 are made of sanitary grade 316L stainless steel pipe.

[0024] The top of the top main body unit 21 is welded with a clip connector 24, the clip connector 24 has a K=50.5, and the clip blind plate 25 is 4 inches, 316L, and is welded about 5cm below the clip connector 24.

[0025] Each main body unit 21 has two holes 26, each 25mm*60mm in diameter, with a spacing of 340mm.

[0026] Chain 23 is a 316 stainless steel chain, approximately 260mm long.

[0027] All of the components described above are existing technologies, and those skilled in the art can use any model and existing design that can achieve their corresponding functions.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. An inner extension tube for verifying the sterilization effect of a live virus wastewater treatment device, characterized in that, The inner tube body (2) includes several main tube units (21) connected end to end. Each main tube unit (21) has several holes (26) spaced apart on its side. Each main tube unit (21) has a support circular plate (27) radially arranged on the inner side of the corresponding main tube unit (21). The biological indicator is placed on the support circular plate (27) in the hole (26) and connected to each other. One end of one main tube unit (21) is provided with an internal thread hole (211), and the other main tube unit (21) connected to it is provided with an external thread part (212). The internal thread hole (211) and the external thread part (212) are threadedly connected to each other.

2. The inner extension tube for verifying the sterilization effect of a live virus wastewater treatment device as described in claim 1, characterized in that, The inner tube body (2) extends into the inactivation tank body (1) through the inlet (11) at the top of the inactivation tank body (1). The top of the top main tube unit (21) is connected to a snap-fit ​​connector (24). A snap-fit ​​blind plate (25) with an opening is connected below the snap-fit ​​connector (24). The snap-fit ​​blind plate (25) is fixed to the top of the inactivation tank body (1).

3. The inner extension tube for verifying the sterilization effect of a live virus wastewater treatment device as described in claim 2, characterized in that, The inner tube body (2) also includes a secondary tube body (22) connected to one end of a main tube body unit (21) via a chain (23). A hole (26) is opened on the side of the secondary tube body (22). A support circular plate (27) is provided radially inside the secondary tube body (22) corresponding to the hole (26). A drain valve connecting pipe (12) is provided at the bottom center of the inactivation tank body (1). A drain valve (3) is connected to the drain valve connecting pipe (12). The secondary tube body (22) is placed inside the drain valve connecting pipe (12).

Images